Longevity · July 6, 2026 · By St. Lloyd Research
NAD+ and the Currency of Cellular Energy
Inside every cell, NAD+ (nicotinamide adenine dinucleotide) shuttles electrons through the mitochondrial machinery that makes ATP the energy that powers everything from muscle contraction to DNA repair.
The problem: NAD+ levels decline steeply with age by some estimates, up to 50% between age 40 and 60 tracking closely with the hallmarks of aging we all recognize: lower energy, slower recovery, reduced resilience.
The salvage pathway offers a route back. Precursors like nicotinamide riboside (NR) are converted efficiently into NAD+, and multiple human trials show supplementation meaningfully raises blood NAD+ levels. Researchers are now exploring what sustained elevation means for long-term healthspan.
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